Abstract
An all-Pyrex liquid helium trap has been designed and tested on a Venema and Bandringa type of ultra-high vacuum system incorporating a mass spectrometer. An overall reduction in total pressure of about one order was achieved, the remaining gases being hydrogen (8 ptorr) and water vapour (4 ptorr).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have